fixed: depend on camera current view

js/ui_init.js

@@ -454,6 +454,7 @@ function x3d_initial_camera_placement(){
         R0 : R0,
         Up0: RC_w.e1(),
         RC_w: RC_w,
+        RC_w0: RC_w
     };
 
     x3dom_setViewpoint(RC_w);

js/x3dom_functions.js

@@ -750,7 +750,7 @@ function x3dom_scene_to_real(x,y,z){
 function x3dom_scene_to_heading(x,y,z){
 
     //var R0 = Data.camera.Matrices.R0;
-    var R0 = Data.camera.Matrices.RC_w.inverse();
+    var R0 = Data.camera.Matrices.RC_w0.inverse();
     var p_w = new x3dom.fields.SFVec3f(x,y,z);
     var p_rw = R0.multMatrixVec(p_w);